Rolled condenser



Aug. 9, 1932.

ROLLED CONDENSER Filed June 24, 1926 ATTORNEYS'.

w." DUBILIER 1,870,949

Patented Aug. 9, w1932 UNITED STATES PATENTfoFFici-z WILLIAM DUBILIEB,OF NEW ROCHELLE, NEW YORK, ASSIGNOB T0 DUBILIER CON- DENSER CORPORATION,0F NEW YORK, N. Y.; A OORPORATION OF DELAWARE CONDENSEB appiicationniea'nme 24, 192e. semi im. 118,383.

The invention relates to improvements in sheets which can be rolled orbent to give 5 the condenser'the desired size and shape.

An object of the invention is to provide a condenser made of flexiblestrips or sheets of'insulation, each of which has a film or layer ofconductive material on both faces, and so 'designed that it requires noinsulating material, between such sheets or units. As a result thecondenser can be easily andlcheaply.,

made, is of relatively small size, and has comparatively low insulationlosses. l

The foregoing and other objects and advantages of the invention will bemade clear inthe following description, taken with the drawings; but thedisclosure is illustrative only, and I may make changes in details with;

out departing from the Aprinciple of the in'- vention or exceeding thescope of the appended claims.

On said drawing,

Figure 1 is a plan view,

Figure 2 an end view; and

Figure 3 a top view of a unit of a condenser according to my invention;i

Figure 4 shows such a unit about to be rolled up;

Figure 5 shows how two or more such units would ordinarily requireinsulation between themif the units are rolled up;

' Figure 6 shows how two or more unitscan be combined for rollingtogether, and at the v same time. dispense with intervening insulation;and

Figure 7 shows a plurality of such units so arranged and ready to berolled up to make the body ofthe condenser.

The same characters i parts throughout.

Referring first to Figures 1, 2 and 3, I show a condenser unitcomprising'a sheet or strip of insulating material 1, having conductivematerial 2 on onel side and electrically conductive material 3 on theIlopposite side` or face. This unit or element may be so made I thatlthe strip of insulation 1 comprises'v a. f film of a substance similarto that employed u formotion pictures or any other suitablemadentify thesame terial, and theelectrically conductive'laye'rs I 2 and 3 may befilms of thin metal attached to the opposite faces of the strip 1 in anysuitable way.l The insulation 1 is flexible, so

that if a condenser were to be made out of 'a l single such unit, theinsulation with the conductive layers 2 and 3 could easily be rolled upas in Figure 4. l. l

If, however, one such unit only y be employed, one of the layers such asthe layer 2 will have to be a positive potential for examplefand then-the layer 3 will have to be negative. Whensuch a unit isrolled up,

theIk layer 2 would make actual contact with y the layer 3, and then thetwo conductive parts of the condenser would no longer be insulated fromeach other. To cbviate this diiii-l culty, I could proceed as shown inFigure 5 which presents two such units with strips of insulation 4 whichmay be paper or any other desirable material. With such a strip ofpaper, or the like, a condenser can be made by taking one such unit ortwo, arranging one strip of paper between the two units as in Figure 5,and the other strip to cover the other unit; whereupon thetwo units canthen be rolled up and their parts of opposite po' larity be kept out ofcontact by the paper` even though the layer 2 of one unit be arrangedclose to the layer 3 of opposite po.

larity to the other unit.

This method of making a condenser out of Y one or more units ofinsulating material'l with'elec'trically conductive layers or arma-v byputting them together in such a way that a conductive layer or armatureon one face of one unit, makes direct contact with a similar disposed sothat their layers 2 make contact, i

then the layers 3 of the two units will be remote from each other, andwill constitute the two outer layers of the construction. Then the twoinner layers 2 can be of one polarity, and the two outer layers of adifferentlpolarity with respect to the layers 2,

but of the same polarity with respect each other. Upon rolling up thetwo umts to make a single rolled condenser, the bottom outside 'layer 3will make contact with nothing else but the upper outside layer 3 whichis of the same polarity, and the layers 3 will always be insulated fromthe layers 2, and no l intervening dielectric between any-twoneighboring units is needed.

Figure 7 shows such a condenser consisting of more than two unitssuperposed and about to be rolled up. The outer layer 3 of the bottomunit will, when the condenser is rolled up and given its final sha makecontact with the outer layer 3 of t e top unit. But there will be partsof op osite polarit in alternation through the body of the con enser andone needs only to connect an electric terminal to la layer 3 of one ofthe units on the outside of the roll, and another electric terminal tothe two layers 2 which arenearf est to the center of the roll, to enablethe condenser to be connected in circuit. Thus I make alcomp-letecondenser without requiru ing any insulation such as the strips 4 bextween the units and all the advantages which are obtained by theemploymenty of a unit comprising insulation l with a'lm of conductivematerial on each face, are retained.

Having described my invention, what I believe to be new and desire tosecure and protect by Letters Patent of the United States is i 1. Aycondenser' comprising rolled units having armatures, said units beingconnected in series bycertain of the armatures con tacting with eachother.

2.l A wound condenser comprising a plu rality of units, each it havingconductive layers, the layers of adjacent units being superposed, and incontact with each other, to connect said units in series.

3. A condenser comprising rolled up units, said units each, havingconductive layers on its opposite faces, the layers of adjacent unitsbeing in contact over' substantially their entire area, so that saidunits are connected in series.

In testimony whereof l aiiix m signature.

